/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Xodnizel
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "mapinc.h"


#define calreg mapbyte1[0]
#define calchr mapbyte1[1]

DECLFW(Mapper41_write) {
	if (A < 0x8000) {
		ROM_BANK32(A & 7);
		MIRROR_SET((A >> 5) & 1);
		calreg = A;
		calchr &= 0x3;
		calchr |= (A >> 1) & 0xC;
		VROM_BANK8(calchr);
	}else if (calreg & 0x4) {
		calchr &= 0xC;
		calchr |= A & 3;
		VROM_BANK8(calchr);
	}
}

static void M41Reset(void) {
	calreg = calchr = 0;
}

void Mapper41_init(void) {
	MapperReset = M41Reset;
	ROM_BANK32(0);
	SetWriteHandler(0x8000, 0xffff, Mapper41_write);
	SetWriteHandler(0x6000, 0x67ff, Mapper41_write);
}
